Tried that. No luck :–(
Here's some more code. Maybe my mistake will be visible somewhere here.
PHPickerConfiguration configuration
var configuration = PHPickerConfiguration(photoLibrary: .shared())
configuration.filter = PHPickerFilter.images
configuration.preferredAssetRepresentationMode = .current
configuration.selection = .default
configuration.selectionLimit = 1
configuration.preselectedAssetIdentifiers = []
Here I get result from the Picker
let provider = pickerResult.itemProvider
guard provider.hasItemConformingToTypeIdentifier(UTType.image.identifier) else { throw Problem.noAssetForPickerResult }
provider.loadFileRepresentation(forTypeIdentifier: UTType.image.identifier, completionHandler: convertAndExtractEXIF)
Copying file to avoid any changes
// inside convertAndExtractEXIF
let originalUrl = Storage.documentsDirectoryUrl.appendingPathComponent("\(UUID().uuidString).heic", isDirectory: false)
try! FileManager.default.copyItem(at: url, to: originalUrl)
Configuring MTKView-based view
private func setup() {
device = MTLCreateSystemDefaultDevice()
clearColor = MTLClearColorMake(0.0, 0.0, 0.0, 0.0)
preferredFramesPerSecond = 1
framebufferOnly = false
enableSetNeedsDisplay = true
delegate = renderer
if let metalLayer = layer as? CAMetalLayer {
if #available(iOS 16, *) {
metalLayer.wantsExtendedDynamicRangeContent = true
}
metalLayer.pixelFormat = .rgba16Float
metalLayer.colorspace = CGColorSpace(name: CGColorSpace.extendedLinearDisplayP3)
}
}
Drawing image from imageURL in the delegate:
func draw(in view: MTKView) {
guard let imageUrl else { return }
Task { @MainActor [imageUrl, view] in
guard let commandQueue = view.device?.makeCommandQueue() else { return print("CommandQueue problem") }
guard let commandBuffer = commandQueue.makeCommandBuffer() else { return print("CommandBuffer problem") }
guard let drawable = view.currentDrawable else { return print("Drawable problem") }
guard let originalImage = CIImage(data: try! Data(contentsOf: imageUrl)) else { return print("Original image problem") }
let originalSize = originalImage.extent.size
let drawableSize = view.drawableSize
let scale = min(CGFloat(drawableSize.width / originalSize.width), CGFloat(drawableSize.height / originalSize.height))
let ciImage = originalImage
.transformed(by: CGAffineTransform(scaleX: scale, y: scale))
let contextOptions: [CIContextOption: Any] = [
.useSoftwareRenderer: false,
]
let ciContext = CIContext(mtlCommandQueue: commandQueue, options: contextOptions)
let destination = CIRenderDestination(
width: Int(view.drawableSize.width),
height: Int(view.drawableSize.height),
pixelFormat: .bgra10_xr_srgb,
commandBuffer: commandBuffer,
mtlTextureProvider: { drawable.texture }
)
try! ciContext.startTask(toRender: ciImage, to: destination)
commandBuffer.present(drawable)
commandBuffer.commit()
}
}
